Grader blade



Jul 28, 1931. c, G MOBE 1,816,389

GRADER BLADE Filed July 1, 1929 [NI/ENTOE bar/e Mote/7.

Patented July 28, 1931 uni-TED STATES" BATENT cl m- 6E GRADEB BLADEApplication filed July 1, 1929, Serial m5. 375,232, and in canada July6, 1928.,

This present inventionrelates to new and useful-improvements in a graderblade and has for its primary object the provision of grader bladestructure which will assure movement of the material toward thecentermannerthat operation of the endlessco'nw' veyorwithin the blade'proper'is independent of operation or functioning of the; blade Astillfurther object of; the ll'lVQlltlOIl residesin theprovision of agrader blade ofthe character stated which includes a simple andefficient type of flexible endless cone"- veyori-mounted on the rearside ofthe blade proper so that the forward run thereofworkslongitudinally through the center ofthe blade proper and substantiallyfi ush there the-blade;

' A stillafurther object of the 'inventionreof the endless conveyorprevent the loose inaterial; from passing betweent-the vanes and" thus:interfering with efficient functioning ofhen nd essconveyor. I

I A still further obj ectaofthe invention rcsidesyinthe provisionpof'agraderblade of the character stated whichis highly efficient in,- use,comparatively, inexpensive and. coInposed-ofgthe,minimum number of partsof sinaple and inexpensive construction rangen ent," I

9 hei ci omp ishmen f h se. and rewith 'guardplates being carried by theblade proper near the forward end thereofto prevent the loose materialf-rom'passingthrough sidesain .thevprovision of a. grader blade of thecharacter stated in which the endless conveyoli rwiorksjthrough thegrader blade proper in such a inannerfthat thevoverlapping varies andar.-'

" plate 11 gradually increase in width toward;

lated objects, as will become apparent as the. '7 description proceeds,my invention resides in the construction, combination and arrange-j mentofparts, asrshall be hereinafter more fully described, illustrated intheaccompanying drawings, and pointedout: in the claims hereuntoappended.

' The invention will be bestunderstood and: can be moreclearly describedwhen reference is had to the drawings forming a part;of this disclosure,wherein 7 like characters indicate like parts throughout theseveral-views,

In the drawings Figure 1 is a front elevation ofthe grader blade; y Y

Figure 2 is a longitudinal transverse section, substantially on the'plane of. line of Figure 1,"looking in the direction indi= cated by thearrows; and e I I Figure 3 is a transverse vertical section,takensubstantially on the plane of -line 3.3;' of-Figure l, lookinginthedirection indi catedby-"thearrows. I

Referring more in detail to the drawings, it is to be noted that thegrader, blade proper- 6 is of conventionalelongated'form with its" lowercutting portion 7 curved vertically or transversely and-the'forwardlowercorner I Scut at an angle. The upper portion,9* of the grader bladeproper 6 iscurved outward 1y, at its; upper edge very slightly, thusleaving the same alniost'straight; The main or central portion of thegrader blade proper is providedwith-anelongated slot 10 open-f ing ontherean end thereof and extending. to within a short distanceof'theforward-end of -the blade proper.- On thisv'forward end, ofthebla'de proper, a guard'plate l'l ispro- 'vicled on its forward faceand slightly flared" toward its free'rear end. The guard plate 11 isattached to the graderblade proper 6;: along the narrow forward end of"the guard plate ll-and the guard plate 11 is, also provided withangularly extended upper and lower edges attached to the grader l blade.proper and'extending pastthe forward rial row end 10a of, the slot 10.The angularly extendediupper and lower edges of'the guard their-rearends, thus supporting-the guard plate 11 at an angle with respect to theface of the grader blade proper 6.

Mounted on the rear face of the grader blade proper 6 and extendinglongitudinally thereof is the conveyor guide plate 12 which has its mainportion spaced outwardly from the rear face of the grader blade proper 6and extended for the greater portion of the length of the slot 10. Theupper and lower longitudinal edges 13 of the plate 12 are offset fromthe main portion thereof and secured on the rear face of the graderblade proper 6 along the longitudinal edges of the slot 10. The forwardend 14 of the plate 12 is extended at an angle with respect to thegreater part of the main portion thereof and with respect to the rearface of the grader blade proper 6, thus serving as a guard for theforward end of the endless conveyor which will be later described indetail. This end 14 of the plate 12 also prevents dirt or other loosematerial from back of the grader blade proper reaching the slot unlesscarried thereto by the endless conveyor and thus conducted by the latterto the front of the grader blade and toward the center of the road. Thisseparation of the guard end 14 from the remainder of the main portion ofthe plate 12 provides an opening 15 in the forward portion of the plate12 through which the endless conveyor operates.

5 and 23 overlap except when Projecting from the conveyor guide plate12, near either end thereof is a pair of bracket bearings 16 in whichare earned the vertical shafts 17 for the endless conveyor. One of theshafts 17 is extended to serve as the driven shaft of the conveyoroperated by any appropriate operating mechanism on the grader of whichthe improved grader blade is a part. On each conveyor shaft 17 is a pairof sprocket wheels 18 around which the flexible sprocketchains 19 of theconveyor operate, the anti-friction rollers 20 of the chains 19 Workingin the recesses of the sprocket wheels 18. Carried on the outer face ofthe links 21 of the conveyor chains 19 are the alternately arrangedvanes 22 and 23, the latter having angular extensions 24 arrangedcentrally on their rear edges. The adjacent vanes 22 passing around thesprocket Wheels 18. 1

As the construction of the device has thus been described in detail,brief reference is now had to its use and modus operandi: The graderblade proper 6 functions in the usual manner with the portions 7 and 8scraping the surface and cutting loose the material to be carried by theblade toward the center of the road. During this functioning of theblade proper 6, the endless conveyor also functions by rotation of theshafts 17 in the proper direction, thus causing the vanes 22 and 23 topass through the opening 15 and then travel rearwardly in front of theplate 12 the upper and lower edges of the vanes 22 and 23 being guidedbetween the main portion of the plate 12 and the rear face of the bladeproper (3 above and below the slot 10 of the latter. As the vanes 22 and23 pass rearwardly along the slot 10 as the forward run of the conveyor,they are in overlapping relation and the angular extensions 24 of thevanes 23 serve to carry the loose material to ward the rear end of theblade proper 6 and thus assure depositing of the same in the centralpart of the road. The conveyor also assures easier operation of thegrader blade and prevents the loose material from piling on the bladeproper 6 and passing over the top thereof. The guard plates 11 and 14also serve to assure proper functioning of the conveyor and preventinterference with the functioning or operation thereof by the loosematerial catching in and clogging the conveyor at the forward endthereof or along the forward run of the conveyor. The anti-frictionrollers 20 of the conveyor working on the forward face of the main partof the plate 12 serve to relieve the forward run of the conveyor ofunnecessary strain and pressure from the loose material being carriedrearwardly by the conveyor.

From the foregoing description taken in connection with the accompanyingdrawings, it will be manifest that a grader blade is provided that willfulfill all the necessary requirements of such a device, but as manychanges could be made in the above descrip tion and many apparentlywidely different embodiments of my invention may be constructed withinthe scope of the appended claims, without departing from the spirit orscope thereof, it is intended that all matters contained in the saidaccompanying specification and drawings shall be interpreted asillustrative and not in a limited sense.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent is 1. A grader blade including a blade properhaving an elongated central slot extended through the greater portionthereof and opening on the rear end of the blade proper; a guard membersecured on said blade proper and spaced from the rear face thereofopposite the slot of said blade proper with the forward end of the guardtapered and secured firmly to the rear face of said blade proper; saidguard having openings through its main central portion opposite theopposite ends of said slot in the blade proper; a small second guardplate secured on the front face of said blade proper and extending at anangle over the forward end of the slot in said blade proper; shaftbearing members projecting in pairs from the opposite ends of said firstmentioned guard member; vertical shafts rotatable in said shaftsupporting bracket; pairs .of sprocket wheels carried on said shafts;

sprocket chains operating around said sprocket wheels; and vanes carriedon said sprocket chains with the alternate vanes provided with angularextensions working through said slot in the blade proper.

2. A grader blade including a blade proper having its lower edge curvedtransversely and the lower forward corners out at an angle; the upperlongitudinal edge of the blade proper being turned slightly outwardly;the main central portion of the blade proper having an elongatedlongitudinal slot extending from a point near the forward end of theblade to the rear end thereof; shaft supporting means provided on therear side of said blade proper adjacent the opposite ends of the slotthereof; sprocket wheels carried on said shafts; sprocket chainsoperating around said sprocket wheels; a guard member provided on therear side of said blade proper with its main portion opposite the mainportion of the slot in said blade proper; rollers carried in saidsprocket chains and operating on the forward face of said guard meansand in the recess between the teeth of said sprocket wheel; overlappingvanes carried on said chains with the alternate vanes provided withoutwardly directed extensions at one edge for operating through the slotin said blade proper; and oppositely directed guard means on the forwardand rear faces of said blade proper projecting over the forward end ofthe slot thereof to prevent gathering of dirt and the like in theforward end of said slot.

In testimony whereof I hereunto affix my signature. I

CHAS. GUSTAF MOBERG. [1,. s.]

